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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - defined template friend is 'sometimes' not defined - std::experimental::any"
href="https://llvm.org/bugs/show_bug.cgi?id=27544">27544</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>defined template friend is 'sometimes' not defined - std::experimental::any
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eyenseo@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16276" name="attach_16276" title="Minimal broken example">attachment 16276</a> <a href="attachment.cgi?id=16276&action=edit" title="Minimal broken example">[details]</a></span>
Minimal broken example
Hello,
Today I tried clang 3.7.1 and 3.9.0 (trunk) with the std::experimental::any
implementation. I reduced the bug to the following (also attached):
class foo {
public:
template <typename T>
friend void gun(foo&) {
}
template <typename T>
friend void gun2(foo&) {
}
};
// error: redefinition of 'gun'
// template <typename T>
// void gun(foo&) {
// }
// error: redefinition of 'gun2'
// template <typename T>
// void gun2(foo&) {
// }
template <typename T>
void fun() noexcept {
foo f;
// no template named 'gun'; did you mean 'fun'?
gun<T>(f);
// error: no template named 'gun2'; did you mean 'gun'?
// 'T' does not refer to a value
gun2<T>(f);
}
int main(int, char const* []) {
fun<void>();
return 0;
}
In the case of std::experimental::any fun is any_cast and gun is __any_cast.
The headers of gcc 5.3.0 were used -- gcc has no problems with the code above.
I hope I got all the information you'll need to figure out this strange bug.
Thank you for your hard work! :)</pre>
</div>
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